Improvement in cultivator attachments



W. P. HUBBARD & J. W. ROBINSON.

CULTIVA TOR ATTACHMENT.

N 19 Q 3Z8 Patented May 1, 1877.-

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1 GFFIGEQ ,wILLI' vr P. n BnA-nD mu ant-w. nonmsolv, or FABMLAND,INDIANA.

' QiMRBoV-EMENTJN:fcu'LTwAToR ATTACHMENTS.

QSpeeificat'i on forming. part of Letters Patent No. 190,32E, dated1,187 7; application filed J 1 a I January 6, 1877.&.

To all whom it ma concern.-

Y 5 Be itknown'thatwe, WILLIAM P. HUBBARD *aiJd' JOHN W; ROBINSON, OfFarmla'nd, in thecounty of Randolph and' State"of Indiana,

have v invented-a new-and valuable Improvementin Cultivator-Attachments;and We do, hereby declare that the following is a full,'-

Said adjusting rod or lever I is made extensible by'hning constructed intwo sections,

clear, and exact 'd'escription of the construction and operation of thesame,- reference being had to the annexed drawings, making a part ofthis specification, and to the letters and figures of reference markedthereon.

Figure 1 of the drawings is a representation of a plan view of ourcultivator attachment, and Fig.2 is a side elevation thereof. Fig. 3 isa detail view of the same.

This inventionrelates to devices for adjusting laterally the draft-polesof wheel-cultivators. The nature of said invention consists, mainly, inproviding the front gear-supporting plate with a rear extension, whichsupports the adjusting-gear or cogged segment, as hereinafter set forth.In the annexed drawings, A designates the frame of a wheel cultivator,which is supported upon driving and transporting wheels B by means of anarched axle, C. To the front part of the top of said frame A is secureda flat metal plate, D, which is broad and rounded in front, so as toform the greater part of a circle, and has at the rear a taperingextension, D. The metal of the interior portions of said plate may bepartly removed, in order to secure lightness, leaving open spaces d. Theconstruction of said plate is shown in detail in Fig. 3.

To the center of the rounded front part of plate D is pivotally secureda disk or wheel, E, which turns thereon like the upper plate of afifth-wheel, and is provided at the rear with cogs e e. If preferred,said cogs may be extended entirely around the circumference of said diskor gear-wheel E. The upper face of said wheel or disk is provided withtwo ridges, e 6, extending from front to rear. In the space between saidridges sets the rear end of a draft-tongue, F, which is pivoted at thesame point as said front gear-wheel E, and turns therewith.

G designates a segmental gear, (which may be changed to a completecog-whee1,) pivoted to the rearextensionD of plate D, and meshgear G isprovided with an adjusting rod or .lever, I, thefront end tof which isset into a recess upon -the' surface of the said gear G.

the upper one of which, I, slides longitudinally through clips M,attached to the lower and main section of said rod; but it may beclamped to said lower section, at any point of its longitudinaladjustment, by means of a clamping-screw, I.

To the under side of said lever I is secured a rigid metal catch-piece,i which is adapted to set into any one of the notchesj on the upper edgeof a curved locking-rack, J, which rack is attached to frame A near therear thereof, as hereinafter described.

The office of adjusting rod or lever I and gears E G is to adjustdraft-tongue F laterally on its pivot, so as to change the position ofthe horses, thereby enabling them to avoid obstacles without alteringthe line of draft. It also facilitates turning, and enables a row ofcorn to be conveniently cultivated quite from end to end. Rack J andcatch 75 conjointly operate to lock said tongue in any position of theaforesaid lateral adjustment. The extensibility of lever I enables theplowman to increase or diminish tl1e amount of leverage accordingto therequirements of his work. It also facilitates grasping said lever. Thepeculiar construction of plate D, terminating at the rear in'taperingend D, securely attaches together the pivoted gears E G, and forms abearing for said gears, preventing them from being strained or casuallyunmeshed by movements incident to the operation of the cultivator. LeverI may be turned sufficiently far to disengage gears E and G, anddrafttongue F may then be turned backward on its pivot, so as to allowthe cultivator and all its attachments to be placed under a barn, shed,or other shelter.

Curved rack-bar J is provided on its rear side with two rigid downwardlyextending screw-threaded metal rods, J, one of which is distinctly shownin Fig. 2. Each one of said rods J passes down through one of the sidebars of frame A, and is held in position by two nuts, j j, arranged,respectively, above and below the same. By these devices said rack-baris held rigidly to said frame, but may be adjusted upward or downward tosuit the pressure of lever I, and to prevent the strainbroadly, which isobjectionable, because the wooden frame is liable to warp and twist, sothat the gears will not mesh with each other,

or be always in line, or may bind, which objections are obviated in ourconstruction by supporting the gears on a metallic piece not liable totwist or warp, which metal support also acts as a shield or protector ofthe gears.

What we claim as new, and desire to secure by Letters Patent, is-

1. 'In combination with the extensible lever I andiadjustable rack-barJ, the plate D and the tongue and lever gears E G, substantially asdescribed, and for the purpose set forth,

2. In a wheel-cultivator, the supporting-plate D, with its extension D,made in one piece, and attached to the transverse braces of the woodenframe A, in combination with the pivoted tongue F, having gear E, andthe pivoted lever I, having gear G, whereby the gears are supported bysaid plate, always held in engagement with each other, and shielded fromobstructions from below, substantially as described, and for the purposeset forth.

In testimony that we claim the above'we have hereunto subscribed ournames in the presence of two witnesses.

' V WILLIAM P. HUBBARD.

JOHN W. ROBINSON,

Witnesses: v

EDWARD S. HUn'soN, DANIEL J ONES.

